Stropping device for safety-razors.



N. R. GEORGE.

STROPPING DEVICE FOR SAFETY RAZORS.

APPLICATION FILED APR. 26, 1909.

949,424. Patented Feb. 15, 1910.

2 SHEETS-SHEET 1.

1& W 75 1/91 hxeoaeo N. R. GEORGE.

STROPPING DEVICE FOR SAFETY RAZORS.

APPLICATION FILED APR. 26, 1909.

Patented Feb. 15, 1910.

2 SHEETS-SHEET 2.

time srai'r NEWTON R. GEOItG-E, OF ROCHESTER, NEW YORK.-

STRGIPIN'G' DEVICE FOR SAFETY-M2038.

arenas.

Specification of Letters Patent.

Patented Feb. is, 1910.

Application filed April .36, 1809. Serial No. 492,221.

Tooll whom it may concern:

Be it known that I, NEWTON R. G-nonon, a citizen. of the United States residing at Rochester in the county of Monroe and State of llew York, have invented certain new and useful Improvements in Stropping' Devices for Safety-Razors, of which the following is a specification.

My invention relatesto stropping devices for razors, and more particularly to a device arranged for the stropping of safety razors, these latter consisting of small blades sharp- ,ened on both sides, and requiring a somewhat different treatment from blades of ordinary razors.

The object of my invention is to provide a mechanism'which will strop both edges of a safety razor blade and will also strop both faces of each of the edges on each reciprocation of the strop, and further to provide an improved blade-carrying shaft which will grip the blade and hold it in position in the machine without an chance of the bladeslipping or shifting rorn one side to the other.

For a full understanding of the invention and the merits thereof, and to acquire a knowledge of the details of construction, reference is to be had to the following de scription and accompanying drawings, in which:

Figure 1 is a erspective view of one form of my device; Fig. 2 is a perspective view showm the other end thereof; Fig. 3 is a longitu inal section; Fi 4 is a perspective view of the blade; i 5 is a perspective view of the blade ho der; Fig. 6 is a fragmenta pers ective view of one end of the rotatab e bla e carrier; Fig. 7 is a longitudinal fragmentary section showing the blade carrier with the blade inserted therein; Fig. 8 is a side elevation of my device, showing the preferred form of sprln Fig. {)is a fragmentary vertical section;

. ig. 10 1s a plan view of the spring shown in igs.

1' and 8; Fig. 11 is a plan view of the arm 15 with its wings; Fig. 12 is an edge view of the arm; Fig. 13 is a side elevation showing a modified form of spring; and Fig. 14 is a like view showing another modification of the sprin Corresponding and like parts are referred to in the followin description and indicated in all the views of the drawings by the same reference characters.

The invention consists of a mechanism as said wherein a razor blade is oscillated in an oscillatory holder and swung from side to side a ainst the opposed faces of the strop, stro is drawn back and forth over a roller w ich is oscillated by the strop and which through a link communicates its movement to the razor holder, this construction doing away with the necessity of toothed ears between the roller and the blade ho lder, and thereby obviating any chance of lost motion due to the gears not meshing properly, and also'making a very simple and chea device. Referring to t .e drawings, the supportin frame of my device is made of sheet meta bent into a general rectangular form and providing a top plate 2 and two end lates 3 and 4, the top late being provide with means whereby t e device as a whole may be supported. The side plates 3 and 4 at their ower ends are braced from each other by cross bars 5, and one of the side plates is verticall slitted, as at 6, this slit intersecting the caring opening 7 forming a bearing for the trunnion 14 of the elliptical blade-carrying shaft. 13. Between the u per ends of the sides is rotatably supporte the roller 8 which may be made of hard rubber, wood, metal, or fiber. Beneath the blade carrier, is provided the central roller 9 which is in alinement with the roller 8 and on either side of the central roller 9 are the side rolls 10 and 11, the rolls 8, 9 and 11 being idle rolls, but the shaft of the roller 10 being provided at its end beyond the endpieoe 3 with .a crank arm 12.

The blade carrier 13 is elliptical in cross section and is split along its len h from one end nearly to the other end. T is blade carrier is formed of spring metal,-and the two sections or legs thereof tend to close upon each other and upon a blade which may be carried therein. The extremities of the blade carrier are provided with trunnions 14 and 14 which extend out through suitable bearings in the sidepieces 3 and 4, the trunnion 14 being connected to an arm 15 which is of the same len h as the arm 12 and is connected thereto y the link 16, so that the two arms 12 and 15 move together and synchronously. Thus, as the roller 10 partially rotates under the influence of the strop, as will .be described, the blade carrier 13 also artially rotates upon its trunnions and roc s the blade through an angular distance of about 90 degrees.

Referring to Figs. 1, 8 and 10, it will be seen that the spring whereby the blade holder is actuated to retract it upon a reverse movement of the strop, consists of a longitudinal resilient rod 17 bent at its middle and at its ends to form semicircular bends 18 and 18, the end bends 18- being reversed in direction to the bend 18". These bends being semicircular, partly surround the trunnions or projecting ends of the rollers 8 and 9 and the trunnion 14* of the blade carrier, as shown clearly in Fig. 1. The arm 15 is provided on its under face with the latorally projecting wings 15 When the arm is inclined in one direction or the other,to ahorizontal plane, it will contact with the. spring 17 and flex it in the manner shown in I Fig. 8. The spring 17 will thus tend to return the blade carrier to a middle position; so as to withdraw the blade from contact with the stro upon-each reverse movement;

of that side or the-strep.

The blade carrier 13, as before remarked, is elliptical in section and is split from one end nearly to the other. The major axis of the blade carrier is normally at an inolination to a plane extending midway between the two ends of the strop. The extremity of the two sections of the blade carrier is re duced, as at 1%, so as to form a split trunnion fitting the bearin 7. The interior faces of the two sections or the carrier are chan neled, as at 21, the opening of the channel 21 being slightl flared at 23 for the easy insertion of the lade-engaging slide bar 24.;

This slide is in the form of a relatively narrow bar having projecting studs 25 on its upper face, these studs being adapted to enter openings 28 in the razor blade 22'. This slide bar 24; is adapted to be inserted in the opening 23 and to be forced into the channel 21. After the bar 2 1 has fully entered the chamber 22, the spring jaws of the blade holder 13 will of course close tightly down upon the blade and will hold the slide bar at securely in position.

The blade 27 to be stropped' is of the usual form or safety razor blades, andis provided with a plurality of perforations .28 along its middle, these perforations being engaged by the studs 25 on the bar 2 1. It will, of course be seen that the edges of the blade project out on both sides of the blade holder 13, and that as the blade holder is rocked 0r oscillated, the blade will also be oscillated so that its 0 posite edges will be turned from one si e to the other. The

strop 28 is doubled over the uppermost roller en ear to oscillate the roller 10. i This in turn will of course oscillate the arm 12 which,through the link 16 andarm 15, will oscillate the blade carrier 13, and the blade will be turned alternately from oneside of the strop to the other. lnasmuch as the bladeprojects on both sides of the blade "carrier, it will be seen that as the right-hand end of the strop is being drawn down, the-upper edge of the blade. will be'turned over to the left and against the left-hand sideof the strop, and that upon a reversal of the movement of the strop, the blade willbe reversed so that its upper edge will come against the right- .han-d strop, and its lower edge against the left-hand. The spring 17 acts to prevent any chance of the blade catching against the strop upon its reversal, for the reason that the moment the strop is reversed, the spring acts to throw Ythe arm 15 in a reverse direction and thusniove-tlie'blade out of contact with the strep.

, In Fig. 13 I. have shown a modification of the s ling arrangei-nent -j which consists in provi ing the opposed springs 30 and 31 which are tast instuds32 promoting from the side plate The arm 15 is extended rearwardly, as at '33, and the springs 30 and 31 are directed toward the arm. It will be seen that as the arm moves from one position to another, it willv contact withthe spring 30 or the spring '31 which will tend to move it back'to a median position. v

In Fig. 1 1 l have shown a still further modification or e -spring arrangement for returning the arm-15 to its middle position. Upon the exterior face of the sidepiece 1 are supportedthe spring tongues 35 and 36.

These are preferably made integral with each othen'and-are attached \to the sidepiece in any desired manner, as by the riveted clamp 37. "The two tongues are 1nwardly bent at their extremities and will contact with the arm 15 in either its raised or its lowered osition, so that when the arm moves upwar it moves against the forcespring 17. I do not wish to be limited to the particular arrangement of these springs,

as it isobvious that any other arrangement might be made. Neither do 1 wish to be limited to the precise construction of my blade carrier, as it may be modified in many ways, though l believe the form shown to be the preferable form; It is of course necessary that the inner faces of the two portions of the strop should be parallel, and to that end, the rollers S and 9 should be of the same diameter. I have shown the rollers 8 and 9 as being rovidcd with the flat screw heads 22 for t e purpose of holding the springs 17 in position, but I do not wish to'be limited to this construction. I have also shown the'arm 15 as being held upon the trunnion 14* b "means of a flat screw the slide bar 24;, and the sli-d.e bar inserted into the split carrier or holder 13, whereupon the two legs or sections of the holder will close down firmly upon the blade and bar, thus holding the bar in position from any lateral or longitudinal movement. The operator then takes hold of the two ends of the strop and alternately draws upon one or the other of these ends, thus oscillating the strop, as before described, and oscillating the pivoted blade holder against the inside faces of the strop.

Having thus describedthe invention, what is claimed as new is 7 1. In a slropping device for razors, a frame, a roller journaled therein, a strep looped over the roller to cause its opposed portions to lie in parallel relation, an oscillatory blade holder journaled in the frame, between the opposite sides of the strep, and having a trunnion projecting through the frame, an arm-on said trunnion, a roller mounted in the frame below the bladeholder, means for holding one side of the strep against said roller, an arm projecting over said roller and looped on the exterior of the frame, and a linlr on the exterior of the frame connecting the roller with the blade holeer.

2. In a strapping device, a f 'anie, a roller journaled therein in the upper -portion of the frame, a strap looped over the roller to cause its opposed portions to lie in parallel relatioinan oscillatory blade holder journaled in the frame between the opposite sides of said strep, said blade holder coi'isisting oi resiliently connected opposed sections be tween which the blade is engaged, a roller mounted in. the frame immedi ly belon the blade holder, a roller mounted in the frame to one side of last it rel lei: and slightly below the same, between which rollers one side of the strepan arm projecting from the casing of the last named roller, an arm irojecting from the blade holder, and a. lirilr connecting the arms.

3. In a stropping device, a frame, a roller {ournaled iii-tie n J, er end thereof, a strep coped over the ro ler to cause its opposed ortions to lie in parallel relation, an oscilatory blade holder journale'd in the frame between opposite sides of said strep, an idler roller mounted in the frame immediately below the blade holder, a roller spaced from the idler roller, the thickness of the strop, but located below the idler roller, and with its circumference nearly in the same plane as the circumference of the idler roller, an arm on the last named roller, an arm on the blade holder, a link connecting the arms and springs engaging to limit the extreme movement of the arms.

v 4:. In a stroppin device, a roller, a strop looped over the rdller to cause its opposed portions to lie in parallel relation, an oscillatory blade holder, and means for oscillatin r said holder through the oscillation of said strop, said blade holder consisting of a split resilient bar, the inner faces of which are channeled longitudinall and a blade carrier adapted to be forced into the channel, said carrier bar being provided Willi means for engaging with a blade.

5. In a stropping device, a frame having a slit at one end for the insertion of a razor blade, and a bearing formed in said slit, a

roller journaled in the frame, a strep looped over the roller to cause its opposed portions to lie in parallel relation, :1 blade holder journaled in the frame between opposite sides of the strop, said blade holder consisting of a split resilient bar, the contacting faces of which are longitudinally channeled, said blade holder bein adapted to be turned so that its channel will alinc with the slit in the sidepiece of the frame, means for oscillating the blade holder upon the reci n'ocation of the strep, and a blade carrier adapted to be inserted into said channel in-the blade gageable with a razor blade.

6. A. blade holder for slropping devices, v

consisting of a bar of resilient material having a trunnion formed at one end, said bar being split from the extremity of the other end, and said split extremity being likewise formed into a trunnion, the contacting inner faces of the split bar having longitudinally opposed channels formed therein, the outer extremity of the channel being flared, and a blade carrier consisting of a bar having projecting studs on one face and a curved em treinity, the carrier sing adapted to be in-- scrted into the ilared opening of the holder and forced inward along the channel thereof.

7. A stro )ing device having therein an orillatory lade holder com )OSGd. of two opposed sections resiliently he d against each other and adapted to receive a razor blade between them and allow the bladeto proouton either side of the holder, :1 strep looped through the device to cause its oposcd ortions to lie in )arallel relation on ach si e of said bladeho der, and mechanism described, an osci latory blade holder, a

strep passing over the roller and downward on either side or the blade carrien neans tor oscillating the blade carrier upon a reci rocation of the strep, an arm on the in ads carrier, and resilient means for resiliently limiting the extreme motion of said arm in either direction and for returning it to a middle position,

10. A stropping device havinotherein an oscillatory blade holder, a roller, a strep passing over the roller, an arm projecting.

from the blade holder, means for oscillating said arm and the blade upon the reciprocation of the strep, wings oppositely: extendill) ing and fast to the arin, and a spring with which the opposite wings engage when the arm 18 reciprocated to return the arm to a central position,

11, A stropping device having therein a frame formed of opposed side plates, an oscillatory blade holder mounted in said frame, an arm projecting from the blade holder and formed with oppositely projecting wings, roller mounted in the upper end of the holder and projecting through the side, plate, a

roller mounted in the lower end of the frame; and projecting through the side plate, and a spring engaged with the projecting ends oi said rollers and partially surrounding at its middle the said blade holder trunnion, said spring being engageable by the opposed wings,

12. A stropping device having therein an oscillatory blade holder, a frame in which the blade holder is mounted, having opposed side pieces, a roller above the blade holder, a strep passing over said roller, a roller below the blade holder over whichsaid strop passes, an. arm projecting from said roller, an arm projecting from the blade holder, a link connecting the two arms, a longitudinall extending spring held at its upper and ower ends and having a central bend surrounding the trunnion of the blade holder, and op posed wings on the arm and trunnion engageable with said spring to flex the same when the arm is oscillated.

13. A stropping device for double-edged razor blades, including a frame, a roller, a strep passing over the roller and adapted to be reciprocated in opposite directions, an oscillatory bladeholder located between the ends or the strep, engageable with the middle of a blade and having its opposed edges projecting from the holder, and means tor oscillating the blade holder in opposite directions upon each reciprocation of the strep.

14;. in a stropping device for double-edged razor blades, an oscillatory blade carrier adaptedto receive a blade and permit its opposite edges to project from the carrier, a stro passing over and down on each side of the lilade carrier and adapted to be reciprocated'", and means for oscillating the blade carrier upon the reciprocation of the strep to bring the opposite edges of the doubleedoed blade into contact with opposite faces of the strep.

.' in testimony whereof 1 other my signature in presence of two witnesses.-

NEVVTQN it. GEQRGE. [n s] Witnesses:

l). A. QAMEPBEFLL, Forensics Vonilznn. 

